971511247321 has 8 divisors (see below), whose sum is σ = 983555836704. Its totient is φ = 959474744640.

The previous prime is 971511247319. The next prime is 971511247339. The reversal of 971511247321 is 123742115179.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 971511247321 - 2¹ = 971511247319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (971511247381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1779735 + ... + 2260636.

It is an arithmetic number, because the mean of its divisors is an integer number (122944479588).

Almost surely, 2^971511247321 is an apocalyptic number.

It is an amenable number.

971511247321 is a deficient number, since it is larger than the sum of its proper divisors (12044589383).

971511247321 is a wasteful number, since it uses less digits than its factorization.

971511247321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4043351.

The product of its digits is 105840, while the sum is 43.

The spelling of 971511247321 in words is "nine hundred seventy-one billion, five hundred eleven million, two hundred forty-seven thousand, three hundred twenty-one".